Civic L4-1590cc 1.6L SOHC (VTEC) (1992)
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Idle Speed/Throttle Actuator - Electronic: Testing and Inspection
Engine Difficult to Start When Cold
Check:
1. Coolant Temperature (TW) Sensor (6)
2. Fast Idle Valve
3. Manifold Absolute Pressure (MAP) Sensor (3)(5)
4. TDC/CRANK/CYL Sensor (4)(8)(9)
5. Atmospheric Pressure (PA) Sensor (13)
6. Electronic Control Unit (ECU) (BU)
NOTE:
After each symptom, the system that could be the source of the symptom are listed and should be checked in the order they are listed, beginning
with #1.
(BU) code used when the CHECK ENGINE warning light is on. Jump the service check connector, if no code is displayed (CHECK ENGINE
LIGHT stays on steady), the back-up system is in operation.
Self-diagnosis indicator, (CHECK ENGINE LIGHT) blinks (?), will follow associated systems.
Fast Idle Out of Specification When Cold
Check:
1. Electronic Air Control Valve (EACV) (14)
2. Other Idle Controls
a. Fast Idle Valve
b. Idle Adjusting Screw
3. Coolant Temperature (TW) Sensor (6)
4. Electronic Control Unit (ECU) (BU)
NOTE:
After each symptom, the system that could be the source of the symptom are listed and should be checked in the order they are listed, beginning
with #1.
(BU) code used when the CHECK ENGINE warning light is on, and the self-diagnosis indicator LED is ON with no "blinks", the back-up system
is in operation.
Frequent Stalling After Warm Up
Check:
1. Idle Control System
a. Electronic Air Control Valve (EACV) (14)
b. Idle Adjusting Screw
2. Fuel Supply
a. Injector Resistor
b. Fuel Injector
c. Contaminated Fuel
3. Exhaust Gas Recirculation (EGR) Control System (12)
4. Atmospheric Pressure (PA) Sensor (13)
5. PGM-FI Control (ECU) Unit (BU)
NOTE:
After each symptom, the system that could be the source of the symptom are listed and should be checked in the order they are listed, beginning
with #1.
(BU) code used when the CHECK ENGINE warning light is on. Jump the service check connector, if no code is displayed (CHECK ENGINE
LIGHT stays on steady), the back-up system is in operation.
Self-diagnosis indicator, (CHECK ENGINE LIGHT) blinks (?), will follow associated systems.
Frequent Stalling During Warm Up
Check: